include/env.h

/*
 *  Copyright (C) 2000-2009, Parallels, Inc. All rights reserved.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#ifndef	_ENV_H_
#define _ENV_H_

#include "types.h"
#include "res.h"
#include "modules.h"
#include <linux/vzcalluser.h>

/** Shutdown timeout.
 */
#define DEF_STOP_TIMEOUT	120
#define MIN_NUMIPTENT		16
#define DEF_CPUUNITS		1000

typedef int (*env_create_FN)(vps_handler *h, envid_t veid, const vps_res *res,
			int wait_p, int old_wait_p, int err_p, void *data);

/** Stop modes.
 */
enum {
	M_HALT,		/**< stop by halt. */
	M_REBOOT,	/**< stop by reboot. */
	M_KILL,		/**< stop by SIGTERM. */
};

/** Allocate and initialize CT handler.
 *
 * @param veid		CT ID.
 * @return		handler or NULL on error.
 */
vps_handler *vz_open(envid_t veid, vps_param *param);

/** Close CT handler.
 *
 * @param h		CT handler.
 */
void vz_close(vps_handler *h);

/** Get CT status.
 *
 * @param h		CT handler.
 * @param veid		CT ID.
 * @return		1 - CT is running
 *			0 - CT is stopped.
 */
int vps_is_run(vps_handler *h, envid_t veid);

/** Start CT.
 *
 * @param h		CT handler.
 * @param veid		CT ID.
 * @param param		CT resources.
 * @param skip		flags to skip CT setup (SKIP_SETUP|SKIP_ACTION_SCRIPT)
 * @param action	modules list, used to call setup() callback
 * @return		0 on success.
 */
int vps_start(vps_handler *h, envid_t veid, vps_param *param,
	skipFlags skip, struct mod_action *action);

int vps_start_custom(vps_handler *h, envid_t veid, vps_param *param,
	skipFlags skip, struct mod_action *mod,
	env_create_FN fn, void *data);

/** Stop CT.
 *
 * @param h		CT handler.
 * @param veid		CT ID.
 * @param param		CT resources.
 * @param stop_mode	stop mode one of (M_REBOOT M_HALT M_KILL).
 * @param skip		flags to skip run action script (SKIP_ACTION_SCRIPT)
 * @param action	modules list, used to call cleanup() callback.
 * @return		0 on success.
 */
int vps_stop(vps_handler *h, envid_t veid, vps_param *param, int stop_mode,
	skipFlags skip, struct mod_action *action);

/** Change root to specified directory
 *
 * @param		CT root
 * @return		0 on success
 */
int vz_chroot(const char *root);
int vz_env_create(vps_handler *h, envid_t veid, vps_res *res,
	int wait_p[2], int old_wait_p[2], int err_p[2],
				env_create_FN fn, void *data);

struct vps_res;
struct arg_start {
	struct vps_res *res;
	int wait_p;
	int old_wait_p;
	int err_p;
	envid_t veid;
	vps_handler *h;
	void *data;
	env_create_FN fn;
	int userns_p; /* while running in userns, there's extra sync needed */
};

struct env_create_param3;
void fill_container_param(struct arg_start *arg,
			  struct env_create_param3 *create_param);
int exec_container_init(struct arg_start *arg,
			struct env_create_param3 *create_param);

int set_personality32();
int vz_do_open(vps_handler *h, vps_param *param);
int ct_do_open(vps_handler *h, vps_param *param);
int check_min_kernel_version(const char *min_version);
#endif